The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 08, 2019
Filed:
Dec. 14, 2017
Nio Usa, Inc., San Jose, CA (US);
Dimitri Bassis, Menlo Park, CA (US);
Brittany M. Repac, Pleasanton, CA (US);
NIO USA, Inc., San Jose, CA (US);
Abstract
Methods and systems for controlling noise in multiple motor gearbox drive units having a common housing are provided. The disclosure describes adjusting an angular position of a drive element of a first motor drive unit relative to the angular position of a drive element of a second motor drive unit in a multiple motor gearbox drive unit. This adjustment to the relative angular position of the drive elements shifts the phase angle of noise sound waves generated by the first and second motor drive units in the multiple motor gearbox drive unit. In some cases, the phase angle shift causes a noise sound wave generated by the first motor drive unit to cancel a noise sound wave generated by the second motor drive unit thereby reducing the overall noise emitted from the common housing of the multiple motor gearbox drive unit while operating.